I don't think the bass management plug-in is that expensive. MiniDSP doesn't support bass management on most of their hardware, but on their website they do list this bass management plugin for sale for the DDRC-88 for $99.yeah they are, but the prices are obviously targeting elaborate studios.
I have to say though, their language is a little confusing. Is this the actual Dirac Bass management plugin or is MiniDSP selling their own plugin that lets you sort of kludge bass management into the regular Dirac software?
The DDRC-88BM plug-in extends the capabilities of the DDRC-88A/88D multichannel Dirac Live® processor. 100% compatible with all DDRC-88A/88D units in the field, the DDRC-88BM adds comprehensive fine-grained bass management and crossover capabilities. The input signals are low-pass filtered and summed to generate the subwoofer signal; a matrix mixer routes or mixes these channels for the Dirac Live® algorithm, which in turn has its outputs routed or mixed to the output channels, where additional high/low pass and parametric filtering takes place. In addition to improved bass management for conventional home theater signal paths, the DDRC-88BM allows innovative solutions like multi-subwoofer control and combined DRC/active loudspeaker setups.